High-frequency transformer.



No. 659,760. Patented Oct. l6, I900. C. P. L. NUXUN.

HIGH FREQUENCY TBANSFUBHER.

(Application filed Feb. 20, 1899.)

2 Sheets-Sheet (No Model.)

N g N d i a I JTNESSES:

- INVENTOR.

A TTOR1 Y.

Patented Oct. I6; 1900. C. P.. L. NUXUN.

HIGH FREQUENCY TRANSFORMER.

(Application flled'leb. 20, 1899.

2 Shoots-Sheet 2.

(N0 Mo'del.)

UV VENTOR.

A I/TORNE V.

ATENT OFFICE.

CHARLES P. L. NOXON, OF SYRACUSE, NEW YORK.

HIGH-FREQUENCY TRANSFORMER.

SPECIFICATION forming part of Letters Patent N 0. 659,760, dated October 16, 1900- Application filed February 20, 1899. Serial No.- 706,185. We model.)

To all whom, it may concern.-

Be it known that I, CHARLES P. L. NOXON, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in High-Frequency Transformers, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to improvements in high-frequency transforming apparatus for transforming currents of low voltage and low frequency to currents. of high voltage and high frequency suitable for therapeutic, X- ray, and similar work. It relates particularly to the sparker by which a double-spark gap is produced, with both gaps always of the same size, also to the inductive controller and the arrangement of the various parts.

My invention will be better understood by reference to the accompanying drawings, in which the same characters of reference indicate corresponding parts in all the figures.

Figure I shows the arrangement of the apparatus with certain parts in section, the sparker in elevation, and the inductive controller in top plan. Fig. II shows a variation in the construction of the sparker. Fig. III indicates another simple variation. Fig. IV is an end elevation of the inductive controller with parts in section. Fig. V is a top 'plan view thereof with the upper plate removed.

In the figures, 1 indicates the case, of wood or other suitable material, with a lining 2, of glass, porecelain, or similar oil-tight insulating material.

3 3 are the line-wires, ofwhich one is connected at 4 to the inductive cqntroller A, the wire 5 leading therefrom to one of the binding-post-s 6 on the cover of the box, the'other line-wire 3 being connected to the other binding-post 6. To these binding-posts bymeans of the knife-blade terminals 8 8 on the inside of the cover connection is automatically made when the cover is set in place, with the terminals of wires 9 9 leading to opposite ends of the primary coil 10 of the low-frequency transformer B, 11 being the core thereof and 12 the secondary coil, connected by wires 13 and 14 to the sparker 0, wire 13 being also connected to one series 15 of the parallel metallic plates of the condenser D, of which the other series of plates 16 are connected to theprimary coil 17 of the high-fre quency transformer E, the wire 14 being connected to the opposite end of coil 17 as well as to the sparker. 18 is the secondary coil of this transformer E, connected to terminals 19, carrying the binding-screws 2O 20 and rods 21 21, of which one is adjustable, forming the secondary or high electromotiveforce spark-gap.

My sparker for producing and regulating the d'oublespark gap, now well recognized as important, consists, essentially, of two terminals suitably supported and insulated and a metallic piece easily adjusted to vary its distance therefrom, so that in all positions it will be at absolutely equal distances from each terminal. Its form may be varied, as shown in the drawings.

In Fig. I the terminals 25 25 are secured on the cover of the box (or otherwise insulated) by means of bolts 26 26, terminating in knifeblades 27 27, through which connection is antomatically made when the cover is set in place with the terminals of wires 13 14. Above these terminals is supported insulating-plate 28, in which is fitted screw 29, carrying movable discharge-surface piece 30 at its lower end and insulating-handle 31 at its upper. By turning the screw the distance of the discharge-surface from the terminals may be varied easily while the machine is in operation, each gap being always equal to the other and the double spark of the oscillatory discharge easily controlled and regulated.

In Fig. II the terminals 25 25 are secured on a base 33, of insulating material, to which is fitted a cover34, of sheet metal, provided with a shoulder 35'to regulate its position on the base and carrying an insulating-plate 36, having in the center a metallic bushing 37, in which is supported the screw 29, carrying the movable discharge-piece. The cover, with attached parts, may be lifted off for cleaning, &c., and when set back into place the sparker is ready for use. A cover is important for all sparkers to deaden the sound.

In Fig. III the terminals and the rotatable discharge-piece, having a discharge-surface at each end, are supposed to be in the same plane. Turned in one direction the surfaces approach the terminals, in the other recede therefrom, thus diminishing or increasing the gaps, which are always, however, equal, the approach and recession on both sides being uniform and simultaneous.

The inductive controller A consists of insulating-plates 4O 40, the upper supported on the lower by posts 41 41, sustaining iron cores 42 42, on which are wound coils 43 43, 44 being a yoke connecting the cores at one end, which at their opposite ends carry arms 45 45, cut out in the arcs of a circle forming the polar surfaces 46 46. Between these surfaces is arranged, concentrically, the magnetic plug 47 on shaft 48, journaled in plate 49 and secured above to shank 50 of insulating-handle 51, turning in bushing 52 in upper plate 40, with indicator 53 and scale 54. Fine divisions of the scale are not necessary. One half 55 of the plug is of larger size, semicircular, and concentric With the polar surfaces, so that when turned, as shown in Fig. V, it makes contact therewith, and we have practically a continuous magnetic circuit, and therefore the inductive effect is at the maximum. The other half 56 of the plug is smaller, though preferably concentric, and as the plug is turned from the position of Fig. V and the smaller half turned between the polar surfaces less and less of the larger portion of the plug is in contact with one or the other of them, and the magnetic reluctance is increased. Between the arms 45 45 is shown gap 60, interrupting the circuit. A gap is not necessary; but the connection between the arms must be small. The smaller half of plug may be of any form, but preferablya smooth semicircle, that the spring 61 may constantly bear against it and force the larger half into contact with the polar surfaces.

The terminals 19 19 are preferably carried on the hollow post 65 65, secured to the cover, to the interior of which are fitted rods 66, of glass or similar insulating material, inclosing connecting-wires 67 67, protected from contact, dampness, &c., by said rods. These rods may be cemented in place in the posts and have springs 68 68 at their lower ends antomatically making a yielding contact with the terminals 69 69 on the wires from the secondary coil of the high-frequency controller and also springs 70 on their upper ends for making yielding but permanent contact with the heads of the screws 71 71, by which the terminals 19 19 are held in position. These yielding contacts are important like the knifeblade terminals 8 8 for making automatic and perfect connection when the cover is set in place without manipulation or injury to any of the parts.

Having thus fully described my invention, what I claim as new, and desire to protect by Letters Patent, is

1. In combination with the coils of a highfrequency transforming apparatus, a sparker having in combination insulated terminals, connections thereto, a discharge-surface piece suitably supported at equal distances from both terminals, and means for moving said discharge-surface piece to and from both terminals simultaneously and uniformly, so that both gaps shall be equal in every position.

, 2. In a high-frequency transforming appa ratus, a sparker having in combination insulated terminals separated by sufiicient space, and connected to the secondary coil of the low-frequency transformerfia metallic discharge-surface piece arranged adjacent to said terminals with a sparking-gap between it and each of them, and having its dischargesurfaces arranged at equal distances from the respective terminals, a shaft secured to said discharge-surface piece rotatably supported so that the dischargesurface may be moved to and from said terminals.

3. In combination, in the sparker of a highfrequency transforming apparatus, terminals secured to an insulating-support,a cover fitted to said support and carrying an insulating plate, a threaded shaft fitted to turn in said plate having the discharge-surface piece secured to its lower end and arranged at an equal distance from said terminals, and an insulating-handle secured to the opposite end of the shaft to rotate the same and move the discharge-piece to or from said terminals simultaneously and uniformly.

4. In combination, in the sparker of a highfrequency transforming apparatus, terminals secured on a disk of insulating material, connections therefrom to the secondary coil of the low-frequency transformer, alcylindrical metallic cover fitted to said disk/and having an inner shoulder adapted to engage therewith, an upper insulating-disk secured to said cylindrical cover, a metallic bushing centrally arranged in said upper disk, a metallic shaft threaded to fit said bushing, a metallic discharge-surface piece secured to the lower end of said shaft and arranged at equal distances from said terminals, and an insulating-handle secured to the upper end of said shaft to rotate said discharge surface piece, moving it uniformly toward and from said terminals.

5. In combination, in the inductive controller of a high-frequency transforming apparatus, upper and lower plates of insulating material, post-s sustaining those plates, cores supported thereon carrying coils connected to the line-wire and to the primary coil of the low-frequency transformer, a connection between said cores at one end, arms secured to the opposite ends of said cores having their adjacent faces cut in the arc of a circle to form polarsurfaces, a magnetic plug j ournaled concentrically therewith having a larger semicircular half adapted to make contact with said surfaces, and a smaller semicircular half not making contact with said surfaces when turned adjacent thereto, means for rotating said plug, and a spring for forcing the larger portion thereof into contact with said polar surfaces.

6. In combination with the case of a highfrequency transformer, a cover carrying the following parts: terminals for the line-wires and connecting-contacts therefor on its under surface; a sparker with connecting-contacts therefor on its under surface; main spark-terminals with connecting-contacts therefor on its under surface; which three pairs of contacts automatically and simultaneously make connection respectively With the terminals of the primary coil of the low-frequency transformer, with the terminals of the secondary coil of the low-frequency transformer, and with the terminals of the secondary coil of the high-frequency transformer.

7. In combination with the parts of the highfrequency transforming apparatus, hollow posts with supports on their ends for the adjustable rods of the main spark-gap, connections between said supports and the interior of said posts, springs secured to said connections within said posts, glass rods fitted to the interior of said posts having longitudinallyextending connecting-Wires in their interior adapted to make permanent contact with said springs at theirupper ends and having springs connected to their lower ends for making temporary yielding contact With the terminals of the secondary coil of the high-frequency transformer.

In testimony whereof I have hereu uto signed my name.

CHARLES P. L. NOXON. 

